Note 3 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

		Fair Value Measurements as of June 30, 2025 (000's):
		Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)				Fair Value
Assets
Corporate bonds		$	—			$	61,175			$	—			$	61,175
Commercial paper			9,415				—				—				9,415
Certificates of deposit			—				918				—				918
U.S. government treasuries			2,734				—				—				2,734
Asset-backed securities			—				3,851				—				3,851
Money market funds (cash equivalents)			3,730				—				—				3,730
Total assets		$	15,879			$	65,944			$	—			$	81,823

		Fair Value Measurements as of December 31, 2024 (000's):
		Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)				Fair Value
Assets
Corporate bonds		$	—			$	44,963			$	—			$	44,963
Commercial paper			12,084				—				—				12,084
Certificates of deposit			—				15,269				—				15,269
U.S. government treasuries			4,399				—				—				4,399
Asset-backed securities			—				6,524				—				6,524
Money market funds (cash equivalents)			23,880				—				—				23,880
Total assets		$	40,363			$	66,756			$	—			$	107,119